Donald Trump may be pursuing a mineral rights deal with Vladimir Putin and Russia as well as with Volodymyr Zelenskyy and Ukraine, a top Senate Democrat has warned, discussing the US president’s demand that Kyiv grant US firms access to 50% of its rare-earth reserves, as a price for helping end the war three years after Russia invaded.

“I think anything that helps position Ukraine for any peace negotiations is a positive move,” said Jeanne Shaheen of New Hampshire, the ranking Democrat on the Senate foreign relations and armed services committee, who recently visited Ukraine.

“Now, what we heard when we were in Ukraine is that 40-50% of those mineral deposits are actually in territory controlled by the Russians. Maybe part of the deal is President Trump is going to get a deal with Vladimir Putin on the mineral rights too. So … that could be a little tricky.”

Shaheen was speaking to the One Decision podcast, hosted by the former MI6 chief Sir Richard Dearlove, the former CIA director Leon Panetta and the reporter Christina Ruffini.